/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.controller.v2;

import java.util.Date;
import java.util.List;

import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService.PrivilegeType;
import com.alibaba.csp.sentinel.util.StringUtil;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.repository.rule.InMemoryRuleRepositoryAdapter;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.domain.Result;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * Flow rule controller (v2).
 *
 * @author Eric Zhao
 * @since 1.4.0
 */
@RestController
@RequestMapping(value = "/v2/flow")
public class FlowControllerV2 {
//
//    private final Logger logger = LoggerFactory.getLogger(FlowControllerV2.class);
//
//    @Autowired
//    private InMemoryRuleRepositoryAdapter<FlowRuleEntity> repository;
//
//    @Autowired
//    @Qualifier("flowRuleNacosProvider")
//    private DynamicRuleProvider<List<FlowRuleEntity>> ruleProvider;
//    @Autowired
//    @Qualifier("flowRuleNacosPublisher")
//    private DynamicRulePublisher<List<FlowRuleEntity>> rulePublisher;
//
//    @GetMapping("/rules")
//    @AuthAction(PrivilegeType.READ_RULE)
//    public Result<List<FlowRuleEntity>> apiQueryMachineRules(@RequestParam String app,
//                                                             @RequestParam String ip,
//                                                             @RequestParam Integer port) {
//
//        if (StringUtil.isEmpty(app)) {
//            return Result.ofFail(-1, "app can't be null or empty");
//        }
//        try {
//            List<FlowRuleEntity> rules = ruleProvider.getRules(app, ip, port);
//            if (rules != null && !rules.isEmpty()) {
//                for (FlowRuleEntity entity : rules) {
//                    entity.setApp(app);
//                    if (entity.getClusterConfig() != null && entity.getClusterConfig().getFlowId() != null) {
//                        entity.setId(entity.getClusterConfig().getFlowId());
//                    }
//                }
//            }
//            rules = repository.saveAll(rules);
//            return Result.ofSuccess(rules);
//        } catch (Throwable throwable) {
//            logger.error("Error when querying flow rules", throwable);
//            return Result.ofThrowable(-1, throwable);
//        }
//    }
//
//    private <R> Result<R> checkEntityInternal(FlowRuleEntity entity) {
//        if (entity == null) {
//            return Result.ofFail(-1, "invalid body");
//        }
//        if (StringUtil.isBlank(entity.getApp())) {
//            return Result.ofFail(-1, "app can't be null or empty");
//        }
//        if (StringUtil.isBlank(entity.getLimitApp())) {
//            return Result.ofFail(-1, "limitApp can't be null or empty");
//        }
//        if (StringUtil.isBlank(entity.getResource())) {
//            return Result.ofFail(-1, "resource can't be null or empty");
//        }
//        if (entity.getGrade() == null) {
//            return Result.ofFail(-1, "grade can't be null");
//        }
//        if (entity.getGrade() != 0 && entity.getGrade() != 1) {
//            return Result.ofFail(-1, "grade must be 0 or 1, but " + entity.getGrade() + " got");
//        }
//        if (entity.getCount() == null || entity.getCount() < 0) {
//            return Result.ofFail(-1, "count should be at lease zero");
//        }
//        if (entity.getStrategy() == null) {
//            return Result.ofFail(-1, "strategy can't be null");
//        }
//        if (entity.getStrategy() != 0 && StringUtil.isBlank(entity.getRefResource())) {
//            return Result.ofFail(-1, "refResource can't be null or empty when strategy!=0");
//        }
//        if (entity.getControlBehavior() == null) {
//            return Result.ofFail(-1, "controlBehavior can't be null");
//        }
//        int controlBehavior = entity.getControlBehavior();
//        if (controlBehavior == 1 && entity.getWarmUpPeriodSec() == null) {
//            return Result.ofFail(-1, "warmUpPeriodSec can't be null when controlBehavior==1");
//        }
//        if (controlBehavior == 2 && entity.getMaxQueueingTimeMs() == null) {
//            return Result.ofFail(-1, "maxQueueingTimeMs can't be null when controlBehavior==2");
//        }
//        if (entity.isClusterMode() && entity.getClusterConfig() == null) {
//            return Result.ofFail(-1, "cluster config should be valid");
//        }
//        return null;
//    }
//
//    @PostMapping("/rule")
//    @AuthAction(value = AuthService.PrivilegeType.WRITE_RULE)
//    public Result<FlowRuleEntity> apiAddFlowRule(@RequestBody FlowRuleEntity entity) {
//
//        Result<FlowRuleEntity> checkResult = checkEntityInternal(entity);
//        if (checkResult != null) {
//            return checkResult;
//        }
//        entity.setId(null);
//        Date date = new Date();
//        entity.setGmtCreate(date);
//        entity.setGmtModified(date);
//        entity.setLimitApp(entity.getLimitApp().trim());
//        entity.setResource(entity.getResource().trim());
//        try {
//            entity = repository.save(entity);
//            publishRules(entity.getApp());
//        } catch (Throwable throwable) {
//            logger.error("Failed to add flow rule", throwable);
//            return Result.ofThrowable(-1, throwable);
//        }
//        return Result.ofSuccess(entity);
//    }
//
//    @PutMapping("/rule/{id}")
//    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
//
//    public Result<FlowRuleEntity> apiUpdateFlowRule(@PathVariable("id") Long id,
//                                                    @RequestBody FlowRuleEntity entity) {
//        if (id == null || id <= 0) {
//            return Result.ofFail(-1, "Invalid id");
//        }
//        FlowRuleEntity oldEntity = repository.findById(id);
//        if (oldEntity == null) {
//            return Result.ofFail(-1, "id " + id + " does not exist");
//        }
//        if (entity == null) {
//            return Result.ofFail(-1, "invalid body");
//        }
//
//        entity.setApp(oldEntity.getApp());
//        entity.setIp(oldEntity.getIp());
//        entity.setPort(oldEntity.getPort());
//        Result<FlowRuleEntity> checkResult = checkEntityInternal(entity);
//        if (checkResult != null) {
//            return checkResult;
//        }
//
//        entity.setId(id);
//        Date date = new Date();
//        entity.setGmtCreate(oldEntity.getGmtCreate());
//        entity.setGmtModified(date);
//        try {
//            entity = repository.save(entity);
//            if (entity == null) {
//                return Result.ofFail(-1, "save entity fail");
//            }
//            publishRules(oldEntity.getApp());
//        } catch (Throwable throwable) {
//            logger.error("Failed to update flow rule", throwable);
//            return Result.ofThrowable(-1, throwable);
//        }
//        return Result.ofSuccess(entity);
//    }
//
//    @DeleteMapping("/rule/{id}")
//    @AuthAction(PrivilegeType.DELETE_RULE)
//    public Result<Long> apiDeleteRule(@PathVariable("id") Long id) {
//        if (id == null || id <= 0) {
//            return Result.ofFail(-1, "Invalid id");
//        }
//        FlowRuleEntity oldEntity = repository.findById(id);
//        if (oldEntity == null) {
//            return Result.ofSuccess(null);
//        }
//
//        try {
//            repository.delete(id);
//            publishRules(oldEntity.getApp());
//        } catch (Exception e) {
//            return Result.ofFail(-1, e.getMessage());
//        }
//        return Result.ofSuccess(id);
//    }
//
//    private void publishRules(String app, String ip, Integer port) throws Exception {
//        List<FlowRuleEntity> rules = repository.findAllByApp(app);
//        rulePublisher.publish(app, ip, port, rules);
//    }
}
